Time to dust off the history books for "most extreme winter cold"

GFS 12z model (and others) advertising a 1070 mb high pressure with temperatures 50°F to 70°F below normal setting up over western North America.

Thursday Dec 22 +9-days is a bit far off, so details uncertain. pic.twitter.com/g3i4qxn9tl

— Ryan Maue (@RyanMaue) December 13, 2022